Portable power supply



FIG. 1 shows a perspective view of a portable power supply of the present invention;

FIG. 2 shows a front view of the portable power supply of FIG. 1;

FIG. 3 shows a rear view of the portable power supply of FIG. 1;

FIG. 4 shows a top view the portable power supply of FIG. 1;

FIG. 5 shows a bottom end view of the portable power supply of FIG. 1;

FIG. 6 shows a right side view of the portable power supply of FIG. 1; and,

FIG. 7 shows a left side view of the portable power supply of FIG. 1.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

CLAIM We claim the ornamental design for a portable power supply, as shown and described. 